Wax-thread sewing machine



w. c. MEYER. WAX THREAD. SEWING MACHINE. APPLICATION FILED JMN. I9, 1920- 1,40 ,20 Patented Feb. 14; 1922.

2 SHEETS-SHEET w (LMEYER.

WAX'THREADSEWING MACHINE.

APPLICATION FILED 1AN.I9.19.20-

,406,206; Patented Feb.14, 1922.

,- i x 2 SHEETS-SHEET 2.

WW 16 v UNITED srnrss PATENT OFFICE.

WILLIAM C. MEYER, 0F BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A. CORPORATION OF NEW JERSEY.

VAX-THREAD SEWING MACHINE.

Specification of Letters Eatent.

Original application filed April 28, 1917, Serial No. 165,107. Divided and this application filed January 19, 1920.. Serial No. 352,585.

the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to wax thread sewing machines, and more particularly to heating mechanism for such machines. The invention is particularly designed as an improvement in machines for sewing inseamsof shoes and is illustrated in the present application as embodied in a machine of this class.

In the operation of inseam shoe sewing machines a great deal of wax from the thread is ordinarily deposited on the awl and channel guide and frequently accumulates to such a degree that it interferes with the proper operation of these parts. When this occurs it is necessary for the operator to remove the accumulated wax. It is, therefore, desirable that the awl and channel guide be kept relatively hot so that the wax which is deposited thereon will not solidify immediately and accumulate on the parts but will run off from the same.

The object of the present invention is to provide a heating mechanism for wax thread sewing machines which will enable certain of the moving work engaging devices of such machines to be maintained ata relativel high temperature. 7

With this object in view the invention consists in the provision, in machines of this class, of heating mechanism involving certain novel and improved features, constructions, and combinations of parts hereinafter described and particularly pointed out in the claims. v I

This application constitutes a division of application, Serial No. 165,107 filed April 28, 1917, and in the accompanying drawings the invention is illustrated'as embodied in the machine shown and described in said application.

The features of the invention Wlll be readdrawings illustrating the invention in its preferred form and the following detailed description of the constructions therein shown.

In the drawings Figure 1 is a view in side elevation of a portion of the head of a machine embodying the invention with certain parts of the frame removed to show more clearly the structure; Fig. 2 is a detail view in front elevation illustrating particularly the mechanism for heating the looper, awl and channel guide; Fig. 3 is a view in side elevation; and Fig. 4 is a plan view substantially of the mechanism shown in Fig. 2.

v Thefmachine illustrated in the drawings is provided with a curved hook needle 2, a looper 4;, a tension wheel 6, aback gage 8, and a back rest 10, all of which have the same construction, arrangement and mode of operation as the corresponding parts of the machine illustrated and described in applicants application referred to above. The feed point or awl of the machine is indicated at 12 and the channel guide at 1 1-.

The awl 12 of the machine is clamped to the awl carrier 16, which is pivotally mounted upon a stud 18 projecting laterally from a block 20 secured to the lower end of the laterally movable feed member or lever 22 mounted on the stud 24. The awl carrier 16 is connected by a link 26 with one arm of a bell crank lever 28 pivoted upon a stud 30. The other arm of this bell crank is connected bya link 32 with the forward end of a cam actuated lever 3 1 pivoted upon a stud 36, and carrying a cam roll 37 engaging in a cam groove in a cam disk mounted on the main shaft 38 of the machine. The link 26 is connected at its respective ends with the awl carrier 16 and with the bell crank lever 28 by universal joints to accommodate the movements of the awl carrier in the direction of feed.

The channel guide 1 1 alsois secured to the lower end of the feed member or lever 22.

The feed member or lever 22 has a recipro eating movement longitudinally of the stud 2 1 to carry the awl and channel guide back and forth in the direction of feed, and a slight pivotal movement on the stud to engage the channel guide with and to disengage it from the bottom of the channel. The reciprocating movement of the feed member 22 upon the stud is imparted by means of an actuating lever 40 pivoted upon a stud 42, one arm of which carries a pin 44 engaging in a groove 46 in a projection on the feed member The lever i0 has a second arm carrying a cam roll l8 engaging in a cam groove in a cam disk mounted on the main shaft 38.

The heating devices for the machine are constructed and arranged for heating the machine by steam, and comprise an inlet pipe 50 connected with a chamber in, a block 52 secured to the forwardly projecting plate 54: forming a part of the frame of the machine. The chamber in the block 52 is connected with one end of a pipe section 56, the opposite end of which is connected with one end of a pipe section 58 having its opposite end threaded into the frame of the machine. The pipe section. 58 communicates through a bore 60 with a steam chamber 62 formed in the frame of the machine. The steam chamber 62 is inclined downwardly and forwardly from its upper end, and is connected at its lower end with the inner end of a pipe section 64. The outer end of the pipe section 64: is connected with one arm of a U-shaped pipe section 66, the other arm of which is connected with the outer end of a pipe section 68 arranged substantially parallel with the pipe section 64. The pipe section 68 extends completely through the forwardly projecting portion 54 of the frame, and is extended to the left some distance beyond this portion of the frame, as shown in Figs. 2 and 4E. The manner in which the steam circulates through the pipes and steam chambers of the heating system is shown by the arrows in Figs. 2, 3 and 4.

This construction and arrangement of the heating mechanism of the machine serves to keep the frame of the machine heated to a comparatively high temperature. A large amount of heat is transmitted to the frameby the steam introduced into the steam chamber in the block 52, and by the steam introduoed into the steam chamber 62, and the frame is heated to a further degree by conduction from the heating pipes connected or contacting therewith. The inner end of the stud 24 upon which the feeding member 22 is mounted is secured in the frame just below the steam chamber 62, and a certain amount of heat is transmitted through this stud to the member 22. The heat transmitted in this manner, however, is not sufficient to heat the channel guide and awl to a high temperature, so that wax'will not stick to and accumulate thereon. As a further provision for heating the member 22, a block block 72 are curved in an arc struck from the axis of the stud 24. lVith this construction a comparatively large area of contact is maintained between the heating block and block 7 2 during the reciprocating movement of the member 22 on the stud 24, and during the pivotal movement of said member on the stud, the contact faces of the blocks sliding over each other during these, movements of the feedingmember. The heat transmitted from the block 7 0 to the feeding member 22 is suflicient to keep the channel guide and awl heated to a high temperature.

Having explained the nature and object of the invention, and having specifically described 21 machine embodying the invention in its preferred form, what is claimed is:

l. A wax thread sewing machine having, in combination, stitch forming devices including a hook needle, a work engaging device, a movable carrier therefor, means for moving the carrier, a fixed heating device,

and devices acting to maintain a direct and continuous heat conducting connection between the heating device and the carrier during the movements of the carrier.

2. A wax thread sewing machine having, in combination, stitch forming devices including a hook needle, a work engaging de-,

vice, a movable carrier therefor, means for moving the carrier, and a fixed heater having a continuous heat conducting contact with an exterior surface on the carrier.

3. A wax thread sewing machine having, in combination, stitch forming devices including a hook needle, a work engaging device, a carrier therefor mounted for sliding and pivotal movement, means for actuating the carrier, and a fixed heater having a continuous sliding contact with an exterior surface on the carrier. 7

at. A wax thread sewing machine having, in combination, stitch forming devices including a hook needle, a work engaging device, a. carrier for, said device mounted for sliding and pivotal movement, means for sliding the carrier and moving the same pivotally, afixed heating device, and means for maintaining a direct and continuous heating connection between the heating the vice and the carrier during the'movements thereof.

5. A wax thread sewing machine having, in combination, stitch forming devices in- L eluding a hook needle, a work engaging device, a carrier for said device, means for actuating the carrier, a fixed heating device and connections between the same and the carrier provided with contacting surfaces arranged for sliding engagement during the movements of the carrier.

6. A wax thread sewing machine having, in combination, stitch forming devices including a hook needle, a work engagin device, a carrier for said device mounted for sliding and pivotal movement, means for sliding the carrier and for moving the same pivotally, a fixed heater and connections between the same and the carrier provided With contacting surfaces arranged for sliding engagement during the pivotal and sliding movement of the carrier.

7. A Wax thread sewing machine having, in combination, stitch forming devices including a hook needle, a work engaing device, a carrier for said device mounted for sliding and pivotal movement, means for sliding the carrier and for moving the same pivotally, and a fixed heater having a heat conductin surface curved about the pivotal center of t e carrier and arranged to remain continuously in contact with a surface on the carrier also curved about said pivotal center.

8. A wax thread sewing machine having, in combination, stitch forming devices, a channel guide, a channel guide carrier, a heating body, and a conductive metallic connection for heatin the channel guide carrier directly from tie heating body.

9. A wax thread sewing machine having, in combination, stitch forming devices, a channel guide, a channel guide carrier bodily movable into different positions, astationary heating body, and a member enga 'ng said heating body and said channel gui e carrier in all of its positions to conduct heat to said channel guide.

WILLIAM C. MEYER. 

